With 2.4.23, i ran into the bug in IDS#6607 "Forwarded bind failure
messages cause success", but was able to fix it by applying the minor
diff of back-ldap/chain.c rev 1.77 (as was mentioned in the bug
follow-up).
I've downloaded RE24 as of today & compiled it up. However, the bug is
still there. Is this fix going to make it into 2.4.24 by any chance?

That fix was related to ITS#6475, but apparently is beneficial in other
issues. Right now, ITS#6475 is not going to be released with 2.4.24,
although I do not have any objection. In any case, I believe
back-ldap/chain.c 1.77 could be released as 2.4.24.

I've dropped just this part of ITS#6475 into RE24. I will mark 6607 as
fixed.